GCC0-GCC2GCC0-GCC2
TCM1-TCM6TCM1-TCM6
3rd byte Bit 1-4: BEI/BIAE3rd byte Bit 1-4: BEI/BIAE
Bits 1-4 show BIP violations BEI/BIAE (Backward Error Indication / Backward
Incoming Alignment Error). Only 10111011 shows BIAE=true.
Bits 1-4Bits 1-4 BIP violationsBIP violations
00000000 0
00010001 1
00100010 2
00110011 3
01000100 4
01010101 5
01100110 6
01110111 7
10001000 8
1001 to 11111001 to 1111 0
3rd byte Bit 5: BDI3rd byte Bit 5: BDI
BDI (Backward Defect Indication) is set to "1" to indicate a signal fail status,
otherwise it is set to "0".
3rd byte Bit 6: IAE3rd byte Bit 6: IAE
IAE (Incoming Alignment Error) is set to "1" to indicate a frame alignment
error, otherwise it is set to "0".
3rd byte Bit 7,8: RES3rd byte Bit 7,8: RES
These bits are reserved.
These fields are used to carry transmission management and signaling
information. These bytes can be edited in hexadecimal value.
TCM1-TCM6 consists of the following parameters:
TTI byte (Trail Trace Identifier)
BIP-8 byte (Bit Interleaved Parity level 8 code)
3rd byte:
Bits 1-4: BIP violations (BEI/BIAE)
Bit 5: Signal fail status (BDI)
Bits 6-8: Status (STAT)
The TTI byte and 3rd byte can both be edited by launching the OTUk TCMn-OTUk TCMn-
TTITTI dialog box, which is similar to the dialog box used to edit SM.
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